grok-4-heavyGrok 4 Heavy is xAI’s proprietary AI model, released Jul 10, 2025.
Scores on standardized evaluations. Higher is better — and rank shows where Grok 4 Heavy lands among all models tracked on Model Beat.
Hardest research math
Grok 4 Heavy is a Grok-family AI model, from xAI, released Jul 10, 2025.
Grok 4 Heavy is an AI model developed by xAI, part of the Grok family, released Jul 10, 2025.
On standardized evaluations tracked by Epoch AI, Grok 4 Heavy scores 2.1% on FrontierMath Tier 4.
Grok 4 Heavy is a proprietary model (Unreleased), available through its provider's API rather than as a downloadable open-weight model.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 9, 2026.